Bulletin of Animal Science is published every four months. The Annual subscription rate is Rp. 150.000,-/year. Bulletin receives original papers in animal science and technology which are not published at any other journals.

This study aimed to analyzing the Strategies for fulfillment animal nutritionist competency at feedloter in Indonesia. Methods in this study using Analytical Hierarchy Process (AHP). The data collection technique was conducted by judgement sampling to seven competent resource persons in the field of animal feed they are feed director in Ministry of Animal Health and Husbandry Republic of Indonesia, Chairman AINI and Director of the competency development and certification AINI period 2015-2019, Academics of lecturer in ransum formulation, operational manager and animal nutritionist in industry feedlot. The questions posed to the resource persons include factors, actors, goals and alternatives that most decisive in the fulfillment animal nutritionist competency at feedloter in Indonesia. The results of the AHP indicate that individual competence factors are critical in the strategy of the needs of livestock animal nutritionist. The Indonesian Association of Nutrition and Feed Technology (AINI) is actor the most influential in fulfilling the needs of animal nutritionist. AINI can conduct competency-based training, skills and knowledge development, latest technological innovations in ration making, and certification of competence of animal nutritionist to enhance individual competence. The alternative that a feedloter should do is to adapt the competency standards policy that exists in our country. It is concluded that the Strategies for fulfillment animal nutritionist competency at feedloter in Indonesiacan be fulfilled through the individuals as animal nutritionist, role of AINI increasing the competence of animal nutritionist, and the application of customized Indonesian welfare in Indonesia.

This study analyzes risks in smallholder cattle production. A household survey was carried out among 109 farmers in a village of Sekaran, one of cattle production center in Bojonegoro, East Java. The monthly average income of farmer household was Rp. 293,877 per capita and it has 2-3 cattles on average. A risk matrix was applied to plot 17 risks related to cattle and farmer households into four quadrants based on the occurrence probability and severity level. Drought, feed scarcity, cattle diseases, and farmer sickness had “high probability and severity level”, and therefore were prioritized to be addressed. The logit regression model of feed scarcity, cattle diseases showed that economies of scale significantly reduced risk of feed scarcity but it could increase risk of cattle diseases. Risk of cattle diseases could be reduced significantly by applying more intensive hygiene and treatment. A livestock pattern transformation from individually separated cages under individual farmers into an integrated or colony farm under farmer group is suggested as a risk management strategy in order to achieve economies of scale and effectively control livestock hygiene and treatment.

This research aimed to investigate the rabbit meat hydrolysate potential as an angiotensin-converting enzyme (ACE) inhibitor. Indonesian local rabbit meats were used in this study. The research was conducted in Department of Animal Product Technology, Faculty of Animal Science, Universitas Gadjah Mada, from August 2016 to February 2017. The local rabbit meats were hydrolyzed by pepsin, trypsin, and pancreatic. The obtained hydrolysates were then analyzed to identify the water-soluble protein content. The molecular weight of the hydrolysates were also confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The ACE inhibitory properties of the hydrolysates were analyzed in vitro. The results showed that pepsin, trypsin, and pancreatic hydrolysis showed a significant effect on the water-soluble protein content of rabbit meat (p<0.05). The water-soluble protein of rabbit meat hydrolysed by pepsin, trypsin, and pancreatic were 9.41, 7.66, and 9.75 mg/mL respectively. The molecular weight of the rabbit meat hydrolysate were increased from 10 to 43 kDa; 17 to 43 kDa; and 10 to 43 kDa, after hydrolysed by by pepsin, trypsin, and pancreatic respectively. Furthermore, the ACE inhibitory properties ) of the hydrolysed rabbit meat by pepsin, trypsin, and pancreatic were 439, 170, and 380 μg/mL, respectively. The rabbit meat hydrolysate showed a potential to be ACE inhibitor after hydrolyzed with pepsin, trypsin and pancreatic. Moreover, it also showed a promising potential to be used as bioactive components in different pharmaceutical applications. The highest ACE inhibitory capability was showed on trypsin hydrolysis with the total of 65.45% and 170 μg/mL ACE inhibition

This research aimed to determine physicochemical, microbiological and sensory properties of fermented whey using kombucha inoculum. The material used were kombucha, black tea, green tea, and whey protein concentrate. The research used factorial completely randomized design. The first factor was kombucha inoculum using different mediums (black and green tea) at different levels (5; 10; 15; dan 20%) as a second factor. The whey was fermented at 37oC for 39 hours. Research showed the use of kombucha inoculum using different medium (black and green tea) at different levels (5; 10; 15; dan 20%) did not affect (p>0.05) on microbiological properties (the number of Total Plate Count, total lactic acid bacteria, total acetic acid bacteria, and total yeast), dissolved protein content, lactose content, viscosity and acceptability. Black and green tea kombucha inoculum can be used in whey fermentation. Black tea kombucha fermented whey with 20% level addition has the best solid content. Relatively, kombucha fermented whey is quite acceptable.

This study was done to determine the effect of Roselle extract level (Hibiscus sabdariffa), and the wheat flour and mocaf flour ratio, as well as the interaction between the Roselle extract level and the wheat flour and mocaf flour ratio on the chemical, physical, and antioxidant activity of chicken sausage. The ingredients used were chicken meat, wheat flour, mocaf flour, Roselle extract, skim milk powder, and spices. Roselle extract levels were 0, 4, and 8% (v/w of total dough) and ratio of wheat flour : mocaf flours were 100:0, 50:50 and 0:100. Parameters observed included chemical composition (moisture, protein, and fat contents), physical properties (pH value and tenderness), and antioxidant activity of chicken sausage. Data were analyzed by analysis of variance of 3x3 factorial and continued by Duncan's new multiple range test test. The results of statistical analysis showed that Roselle extract level gave a significant effect (P<0.05) on moisture content, pH value, and antioxidant activity of chicken sausage. Ratio of wheat flour : mocaf flour gave a significant effect (P<0.05) on protein content, tenderness and antioxidant activity of chicken sausage. There was no interaction between Roselle extract level and the wheat flour : mocaf flour ratio on the physicochemical properties and antioxidant activity of chicken sausage. The conclusion of this study is the addition of Roselle extract upto 8% will increase moisture content and antioxidant activity, but it decreases the pH value and tenderness of chicken sausage. Subtitution of wheat flour with mocaf flour will reduce protein content, tenderness and antioxidant activity of chicken sausage.

The aim of this study was to evaluate the effect of different IgY concentrations on the production, reproduction and immunity of Sentul chicken. This research used 20 month-old Sentul chickens which consisting of 10 chickens with high IgY concentration and 10 chickens with low IgY concentration Parameters observed included prelayer performance (feed consumption, weight gain, feed conversion, morbidity and mortality), layer performance (feed consumption, egg production, egg weight, feed conversion, hatchability, morbidity and mortality), and immunity at chicks (IgY concentration of eggs and chicks serum). The experiment was conducted as a completely randomized design. The treatments were high and low IgY concentration. All treatments were repeated 10 times. The data obtained were analyzed using the SAS program t-test. Morbidity and mortality were analyzed descriptively. The results of this research indicated that the prelayer period, chickens with high IgY concentration had a higher performance than chicken with low IgY concentration. This is caused by about 30% chickens with low IgY were in sick condition for approximately seven days. Further, the layer period showed that the chickens with high IgY concentration had lower production performance than the chicken with low IgY concentration. The study concluded that chickens at low IgY concentrations are susceptible to exposure to antigens that lead to decreased productivity. In normal conditions hens, Sentul with high IgY concentration resulted in low production. The observation of chicken immunity showed that concentration of IgY from chicks and eggs did not differ between hens with high IgY concentrations and hens with low IgY concentrations.

The purpose of this research was to determine the effect of heat stress on thermoregulation, haematology, and productivity of Holstein Friesian (HF) dairy cows raised in different elevations. A total of 63 HF in a normal lactation period were used in this study. The research was conducted for 3 months during dry season in three different areas, which were at Pondok Ranggon (97 m.a.s.l) which categorized as a lowland, Ciawi (576 m.a.s.l) which categorized as a lower-upland, and Lembang (1241 m.a.s.l) which categorized as an upland. Observation on microclimate aspects which includes environmental temperature (Ta), relative humidity (RH) and Temperature-Humidity Index (THI) was done by recording each variable for every 2 hours starting from 08.00 to 16.00 WIB. The thermoregulation analysis was done based on the given physiological responses which consisted of the skin temperature (Ts), rectal temperature (Tr), body temperature (Tb), heart rate (Hr), respiratory rate (Rr), Heat Tolerance Coefficient (HTC), plasma cortisol level and haematological profile observation. The Ta, Rr, and THI measurements showed that in the lowland and lower-upland, the HF experienced moderate heat stress, while the HF raised in the upland area experienced less heat stress. The results showed that the dairy cows which raised in lowland had the highest HTC, Tr, Ts and Tb (P<0.05) and lowest Hr (P<0.05). All of the physiological and haematological parameters in the three study area showed a normal value.Furthermore, the erythrocyte, Hb and PVC concentration in a lowland raised HF were higher (P<0.05), while the plasma cortisol levels were not significantly different. The milk production of the observed dairy cows in different elevations was significantly different (P<0.05), with the highest milk yields, were found in the upland raised HF (13.1±3.52 kg), followed by the lower-upland (11.3±4.73 kg) and lowland (7.0±3.36 kg). In general, all of the HF raised in different land elevations was exposed to heat stress during dry seasons, even though the cows showed the ability to physiologically adapt and cope with the conditions.

The Thyroglobulin (TG) and Leptin (LEP) genes are two candidate genes that widely used for molecular selection to improve carcass traits in beef cattle. This research was carried out to identify the genetic characterization of TG and LEP genes from 47 heads of Pasundan cows at West Java using PCR-RFLP method. Research shows that TG gene of Pasundan cattle is monomorphic with C allele as the dominant allele (1.00). However, LEP gene of Pasundan cattle is polymorphic with C allele as the dominant allele (0.98) and T as the rare allele (0.02). The polymorphic informative content (PIC) and numberof effective allele (ne) values in the LEP gene in the animal studied were 0.04 and 1.04 respectively. It was concluded that TG/BstYI and LEP/Sau3AI gene in the present study can not be used as molecular selection in Pasundan cattle. These results are important as the basic information for preparing the molecular selection program in the future.

Purpose of this research is to focus on importance of knowing the activities of smallholder enterprise systems, types and trends in the patterns of integrated systems adopted, the impact of implementing integrated systems and the implications for sustainability of livestock systems. This research also emphasize the importance of opportunities in enhancing and increasing livestock productivity and increasing production in smallholder farms and developing the easiest formulation of strategies for sustainable livestock systems. A qualitative method using Soft System Methodology (SSM) from System Thinking was chosen to visualize the activities of smallholder enterprise systems and the pattern of integrated systems are presented descriptively. The next study method of quantitative is used to determine the impact of livestock productivity on each applied integrated systems presented comparatively. Soft System Methodology succeed to visualize smallholder enterprise systems at the level of individual and community level of farmer. Farmer’s group activity influence the pattern of integrated systems that impacted on beef cattle’s productivity. The ICLFS pattern promotes a way of optimally utilizing agroecosystems and it has potential and become candidate system that be able in enhancing and increasing productivity, increasing livestock production and farmer's income, and realize beef self-sufficiency.

The aim of this research was to examine the microbiological quality of calf starter pellet added with fermented cabbage waste after stored for 0, 4, and 6 weeks. The materials used in this research consisted of cornmeal, rice bran, soybean meal, molasses, mineral mix, and fermented cabbage waste. This research used Completely Randomized Design with 4 treatments and 3 replications. The mixed calf starter pellet consisted of 100% calf starter and 6% of fermented cabbage waste, and then stored for 0 weeks (P0), 2 weeks (P1), 4 weeks (P2) and 6 weeks (P3). The observed microbial qualities were the total lactic acid bacteria and the presence of gram positive and negative bacteria in the mixed calf starters. The total lactic acid bacteria were analyzed descriptively, while the presence of gram bacteria was analyzed with analysis of variance followed with Duncan’s test. The result of this research showed that an increase in storage time would result in lower lactic acid bacteria population, while the gram-positive and negative bacteria was not significantly affected. The research concluded that 6-weeks stored calf starter pellet added with 6% of fermented cabbage waste could maintain its lactic acid and gram-positive bacteria population, while also reducing its gram-negative bacteria population as well.